Developer Metaio knows a thingor two about augmented reality, and building on the magic of its Audi eKurzinfo app, it’s created some prototype software for Google Glass that straps a car’s instruction manual to your face. Instead of relying on markers, GPS or point-cloud processing, the Glass app uses reference CAD models to identify what you’re looking at and overlay directions on a 3D plane. As useful as it may be for walking you through a washer fluid refill (video after the jump), Metaio has created the app to showcase its updated AR platform that’s intended to work with wearables like Epson’s Moverio and the Vuzix M100, as well as Mountain View’s monocle. The firm’s Glass app may never progress beyond proof of concept, but those attending Metaio’s annual InsideAR conference in Munich this October can look forward to a live demo.